216161240398513 has 2 divisors, whose sum is σ = 216161240398514. Its totient is φ = 216161240398512.

The previous prime is 216161240398487. The next prime is 216161240398559. The reversal of 216161240398513 is 315893042161612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109604818669824 + 106556421728689 = 10469232^2 + 10322617^2 .

It is a cyclic number.

It is not a de Polignac number, because 216161240398513 - 2¹³ = 216161240390321 is a prime.

It is a super-2 number, since 2×216161240398513² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (216161240348513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108080620199256 + 108080620199257.

It is an arithmetic number, because the mean of its divisors is an integer number (108080620199257).

Almost surely, 2^{216161240398513} is an apocalyptic number.

It is an amenable number.

216161240398513 is a deficient number, since it is larger than the sum of its proper divisors (1).

216161240398513 is an equidigital number, since it uses as much as digits as its factorization.

216161240398513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 216161240398513 in words is "two hundred sixteen trillion, one hundred sixty-one billion, two hundred forty million, three hundred ninety-eight thousand, five hundred thirteen".